The Kushan dynasty had diplomatic contacts with the Roman Empire, Sasanian Persia, Aksumite Empire and Han China. While much philosophy, art, and science was created within its borders, the only textual record of the empire's history today comes from inscriptions and accounts in other languages, particularly Chinese.[24] The Kushan empire fragmented into semi-independent kingdoms in the 3rd century AD, which fell to the Sasanians invading from the west. In the 4th century, the Guptas, an Indian dynasty also pressed from the east. The last of the Kushan and Sasanian kingdoms were eventually overwhelmed by invaders from the north, known as the Hepthalites.[5] Historian H. G. Rawlinson states that the "Kushana Period is a fitting prelude to the age of Guptas"[vague].[25]

Chinese sources describe the Guishuang (貴霜), i.e. the Kushans, as one of the five aristocratic tribes of the Yuezhi (月氏), with some people claiming they were a loose confederation of Indo-European peoples,[26] though many scholars are still unconvinced that they originally spoke an Indo-European language. As the historian John E. Hill has put it: "For well over a century ... there have been many arguments about the ethnic and linguistic origins of the Da Yuezhi (大月氏), Kushans (貴霜), and the Tochari, and still there is little consensus".[27]

The Yuezhi had been living in the arid grasslands of eastern Central Asia's Tarim Basin, in modern-day Xinjiang, China, possibly speaking varieties of the Tocharian languages, until they were driven west by the Xiongnu in 176–160 BCE. The five tribes constituting the Yuezhi are known in Chinese history as Xiūmì (休密), Guìshuāng (貴霜), Shuāngmǐ (雙靡), Xìdùn (肸頓), and Dūmì (都密).

The Yuezhi reached the Hellenic kingdom of Greco-Bactria (in northern Afghanistan and Uzbekistan) around 135 BC. The displaced Greek dynasties resettled to the southeast in areas of the Hindu Kush and the Indus basin (in present-day Afghanistan and Pakistan), occupying the western part of the Indo-Greek Kingdom.

Some traces remain of the presence of the Kushans in the area of Bactria and Sogdiana. Archaeological structures are known in Takht-I-Sangin, Surkh Kotal (a monumental temple), and in the palace of Khalchayan. Various sculptures and friezes are known, representing horse-riding archers,[28] and significantly men with artificially deformed skulls, such as the Kushan prince of Khalchayan[29] (a practice well attested in nomadic Central Asia). The Chinese first referred to these people as the Yuezhi and said they established the Kushan Empire, although the relationship between the Yuezhi and the Kushans is still unclear. On the ruins of ancient Hellenistic cities such as Ai-Khanoum, the Kushans are known to have built fortresses.

The earliest documented ruler, and the first one to proclaim himself as a Kushan ruler, was Heraios. He calls himself a "tyrant" on his coins, and also exhibits skull deformation. He may have been an ally of the Greeks, and he shared the same style of coinage. Heraios may have been the father of the first Kushan emperor Kujula Kadphises.

Ban Gu's Book of Han tells us the Kushans (Kuei-shuang) divided up Bactria in 128 BC. Fan Ye's Book of the Later Han "relates how the chief of the Kushans, Ch'iu-shiu-ch'ueh (the Kujula Kadphises of coins), founded by means of the submission of the other Yueh-chih clans the Kushan Empire, known to the Greeks and Romans under the name of Empire of the Indo-Scythians."[30]

The Chinese Hou Hanshu chronicles gives an account of the formation of the Kushan empire based on a report made by the Chinese general Ban Yong to the Chinese Emperor c. 125 AD:

More than a hundred years later [than the conquest of Bactria by the Da Yuezhi], the prince [xihou] of Guishuang (Badakhshan) established himself as king, and his dynasty was called that of the Guishuang (Kushan) King. He invaded Anxi (Indo-Parthia), and took the Gaofu (Kabul) region. He also defeated the whole of the kingdoms of Puda (Paktiya) and Jibin (Kapisha and Gandhara). Qiujiuque (Kujula Kadphises) was more than eighty years old when he died. His son, Yangaozhen [probably Vema Tahk (tu) or, possibly, his brother Sadaṣkaṇa], became king in his place. He defeated Tianzhu [North-western India] and installed Generals to supervise and lead it. The Yuezhi then became extremely rich. All the kingdoms call [their king] the Guishuang [Kushan] king, but the Han call them by their original name, Da Yuezhi.|Hou Hanshu[31][32]

A Buddhist devotee in Kushan dress, Mathura, 2nd century. The Kushan dress is generally depicted as quite stiff, and it is thought it was often made of leather (Francine Tissot, "Gandhara").

In the 1st century BCE, the Guishuang (Ch: 貴霜) gained prominence over the other Yuezhi tribes, and welded them into a tight confederation under yabgu (Commander) Kujula Kadphises. The name Guishuang was adopted in the West and modified into Kushan to designate the confederation, although the Chinese continued to call them Yuezhi.

The Kushan writing system used the Greek alphabet, with the addition of the letter Sho.

The Kushans adopted elements of the Hellenistic culture of Bactria. They adopted the Greek alphabet to suit their own language (with the additional development of the letter Þ "sh", as in "Kushan") and soon began minting coinage on the Greek model. On their coins they used Greek language legends combined with Pali legends (in the Kharoshthi script), until the first few years of the reign of Kanishka. After that date,[vague][when?][dubious– discuss] they used Kushan language legends (in an adapted Greek script), combined with legends in Greek (Greek script) and legends in Prakrit (Kharoshthi script).

The Kushans "adopted many local beliefs and customs, including Zoroastrianism and the two rising religions in the region, the Greek cults and Buddhism".[34] From the time of Vima Takto, many Kushans started adopting aspects of Buddhist culture, and like the Egyptians, they absorbed the strong remnants of the Greek culture of the Hellenistic Kingdoms, becoming at least partly Hellenised. The great Kushan emperor Vima Kadphises may have embraced Saivism, as surmised by coins minted during the period. The following Kushan emperors represented a wide variety of faiths including Zoroastrianism, Buddhism, and possibly Saivism (a sect of Hinduism).

The rule of the Kushans linked the seagoing trade of the Indian Ocean with the commerce of the Silk Road through the long-civilized Indus Valley. At the height of the dynasty, the Kushans loosely ruled a territory that extended to the Aral Sea through present-day Uzbekistan, Afghanistan, and Pakistan into northern India.

The loose unity and comparative peace of such a vast expanse encouraged long-distance trade, brought Chinese silks to Rome, and created strings of flourishing urban centers.

Rosenfield notes that archaeological evidence of a Kushan rule of long duration is present in an area stretching from Surkh Kotal, Begram, the summer capital of the Kushans, Peshawar, the capital under Kanishka I, Taxila, and Mathura, the winter capital of the Kushans.[35]

The recently discovered Rabatak inscription confirms the account of the Hou Hanshu, Weilüe, and inscriptions dated early in the Kanishka era (incept probably 127 CE), that large Kushan dominions expanded into the heartland of northern India in the early 2nd century CE. The lines 4 to 7 of the inscription[38] describe the cities which were under the rule of Kanishka, among which six names are identifiable: Ujjain, Kundina, Saketa, Kausambi, Pataliputra, and Champa (although the text is not clear whether Champa was a possession of Kanishka or just beyond it).[39][40][41] Northward, in the 2nd century AD, the Kushans under Kanishka made various forays into the Tarim Basin, seemingly the original ground of their ancestors the Yuezhi, where they had various contacts with the Chinese. Both archaeological findings and literary evidence suggest Kushan rule, in Kashgar, Yarkand and Khotan. The Kushan state was bounded to the south by the Pārata state of Balochistan, western Pakistan, Afghanistan, Kyrgyzstan, Tajikistan, Uzbekistan, Turkmenistan. Turkmenistan was known for the kushan Buddhist city of Merv.[35] As late as the 3rd century AD, decorated coins of Huvishka were dedicated at Bodh Gaya together with other gold offerings under the "Enlightenment Throne" of the Buddha, suggesting direct Kushan influence in the area during that period.[42]

Our knowledge of Khwarezmian is limited to its Middle Iranian stage and, as with Sogdian, little is known of its ancient form.

From the writings of the great Khwarezmian scholars, Al-Biruni and Zamakhshari, we know that the language was in use at least until the 13th century, when it was gradually replaced by Persian and Turkic languages for the most part, as well as several dialects with Kushan religion.

...the prince [elavoor] of Guishuang, named thilac [Kujula Kadphises], attacked and exterminated the four other xihou. He established himself as king, and his dynasty was called that of the Guishuang [Kushan] King. He invaded Anxi [Indo-Parthia], and took the Gaofu [Kabul] region. He also defeated the whole of the kingdoms of Puda [Paktiya] and Jibin [Kapisha and Gandhara]. Qiujiuque [Kujula Kadphises] was more than eighty years old when he died."|Hou Hanshu[31]

These conquests probably took place sometime between 45 and 60, and laid the basis for the Kushan Empire which was rapidly expanded by his descendants.

Kujula issued an extensive series of coins and fathered at least two sons, Sadaṣkaṇa (who is known from only two inscriptions, especially the Rabatak inscription, and apparently never ruled), and seemingly Vima Takto.

Vima Takto (Ancient Chinese: 閻膏珍 Yangaozhen) is mentioned in the Rabatak inscription (another son, Sadashkana, is mentioned in an inscription of Senavarman, the King of Odi). He was the predecessor of Vima Kadphises, and Kanishka I. He expanded the Kushan Empire into the northwest of the South Asia. The Hou Hanshu says:

"His son, Yangaozhen [probably Vema Tahk (tu) or, possibly, his brother Sadaṣkaṇa], became king in his place. He defeated Tianzhu [North-western India] and installed Generals to supervise and lead it. The Yuezhi then became extremely rich. All the kingdoms call [their king] the Guishuang [Kushan] king, but the Han call them by their original name, Da Yuezhi."

Vima Kadphises (Kushan language: Οοημο Καδφισης) was a Kushan emperor from around 90–100 CE, the son of Sadashkana and the grandson of Kujula Kadphises, and the father of Kanishka I, as detailed by the Rabatak inscription.

Vima Kadphises added to the Kushan territory by his conquests in Afghanistan and north-west Pakistan. He issued an extensive series of coins and inscriptions. He issued gold coins in addition to the existing copper and silver coinage.

The rule of Kanishka the Great, fifth Kushan king, who flourished for about 13 years from c. 127. Upon his accession, Kanishka ruled a huge territory (virtually all of northern India), south to Ujjain and Kundina and east beyond Pataliputra, according to the Rabatak inscription:

In the year one, it has been proclaimed unto India, unto the whole realm of the governing class, including Koonadeano (Kaundiny, Kundina) and the city of Ozeno (Ozene, Ujjain) and the city of Zageda (Saketa) and the city of Kozambo (Kausambi) and the city of Palabotro (Pataliputra) and so long unto (i.e. as far as) the city of Ziri-tambo (Sri-Champa).

— Rabatak inscription, Lines 4–6

His territory was administered from two capitals: Purushapura (now Peshawar in northwestern Pakistan) and Mathura, in northern India. He is also credited (along with Raja Dab) for building the massive, ancient Fort at Bathinda (Qila Mubarak), in the modern city of Bathinda, Indian Punjab.

The Kushans also had a summer capital in Bagram (then known as Kapisa), where the "Begram Treasure", comprising works of art from Greece to China, has been found. According to the Rabatak inscription, Kanishka was the son of Vima Kadphises, the grandson of Sadashkana, and the great-grandson of Kujula Kadphises. Kanishka’s era is now generally accepted to have begun in 127 on the basis of Harry Falk’s ground-breaking research.[51][52] Kanishka’s era was used as a calendar reference by the Kushans for about a century, until the decline of the Kushan realm.

Vāsishka was a Kushan emperor who seems to have a 20-year reign following Kanishka. His rule is recorded as far south as Sanchi (near Vidisa), where several inscriptions in his name have been found, dated to the year 22 (The Sanchi inscription of "Vaksushana" – i. e. Vasishka Kushana) and year 28 (The Sanchi inscription of Vasaska – i. e. Vasishka) of the Kanishka era.

Huvishka (Kushan: Οοηϸκι, "Ooishki") was a Kushan emperor from about 20 years after the death of Kanishka (assumed on the best evidence available to be in 140) until the succession of Vasudeva I about thirty years later. His rule was a period of retrenchment and consolidation for the Empire. In particular he devoted time and effort early in his reign to the exertion of greater control over the city of Mathura.

Vasudeva I (Kushan: Βαζοδηο "Bazodeo", Chinese: 波調 "Bodiao") was the last of the "Great Kushans." Named inscriptions dating from year 64 to 98 of Kanishka’s era suggest his reign extended from at least 191 to 225 AD. He was the last great Kushan emperor, and the end of his rule coincides with the invasion of the Sasanians as far as northwestern India, and the establishment of the Indo-Sasanians or Kushanshahs in what is nowadays Afghanistan, Pakistan and northwestern India from around 240 AD.

The Kushan religious pantheon is extremely varied, as revealed by their coins that were made in gold, silver, and copper. These coins contained more than thirty different gods, belonging mainly to their own Iranic, Greek, and Indo-Aryan worlds as well. Kushan coins had images of Kushan Kings, Buddha, and figures from the Indo-Aryan and Iranian pantheons.[53] Greek deities, with Greek names are represented on early coins. During Kanishka's reign, the language of the coinage changes to Bactrian (though it remained in Greek script for all kings). After Huvishka, only two divinities appear on the coins: Ardoxsho and Oesho (see details below).

Two copper coins of Huvishka bear a 'Ganesa' legend, but instead of depicting the typical theriomorphic figure of Ganesha, have a figure of an archer holding a full-length bow with string inwards and an arrow. This is typically a depiction of Rudra, but in the case of these two coins is generally assumed to represent Shiva.

Kushan coins showing half-length bust of Vima Kadphises in various poses, holding mace-scepter or laurel branch in right hand; flames at shoulder, tamgha to right or left. On the other side of coin is a deity with a bull. Some consider the deity as Shiva because he is in ithyphallic state, holds a trident, and the Nandi bull is his mount, as in Hindu mythology.[55][56][60] Others suggest him as Oesho, Zoroastrian Vayu.

Early Mahayana Buddhist triad. From left to right, a Kushan devotee, Maitreya, the Buddha, Avalokitesvara, and a Buddhist monk. 2nd–3rd century, Gandhara

The Kushans inherited the Greco-Buddhist traditions of the Indo-Greek Kingdom they replaced, and their patronage of Buddhist institutions allowed them to grow as a commercial power.[61] Between the mid-1st century and the mid-3rd century, Buddhism, patronized by the Kushans, extended to China and other Asian countries through the Silk Road.

Kanishka is renowned in Buddhist tradition for having convened a great Buddhist council in Kashmir. Along with his predecessor in the region the Indo-Greek king Menander I (Milinda) and the Indian emperors Ashoka and Harsha Vardhana, Kanishka is considered by Buddhism as one of its greatest benefactors.

During the 1st century AD, Buddhist books were being produced and carried by monks, and their trader patrons. Also, monasteries were being established along these land routes that went from China and other parts of Asia. With the development of Buddhist books, it caused a new written language called Gandhara. Gandhara consists of eastern Afghanistan and northern Pakistan. Scholars are said to have found many Buddhist scrolls that contained the Gandhari language.[62]

The reign of Huvishka corresponds to the first known epigraphic evidence of the Buddha Amitabha, on the bottom part of a 2nd-century statue which has been found in Govindo-Nagar, and now at the Mathura Museum. The statue is dated to "the 28th year of the reign of Huvishka", and dedicated to "Amitabha Buddha" by a family of merchants. There is also some evidence that Huvishka himself was a follower of Mahāyāna Buddhism. A Sanskrit manuscript fragment in the Schøyen Collection describes Huvishka as one who has "set forth in the Mahāyāna."[63]

Standing Female, 1st century CE Terracotta. This lively female figure comes from an area of Pakistan where merchants from around the Mediterranean had long maintained trading posts. The area, known in antiquity as Gandhara, developed an unusual hybrid style of art and culture that was at once Hellenic and Indic. Brooklyn Museum

The art and culture of Gandhara, at the crossroads of the Kushan hegemony, continued the traditions of Greco-Buddhist art and are the best known expressions of Kushan influences to Westerners. Several direct depictions of Kushans are known from Gandhara, where they are represented with a tunic, belt and trousers and play the role of devotees to the Buddha, as well as the Bodhisattva and future Buddha Maitreya.

During the Kushan Empire, many images of Gandhara share a strong resemblance to the features of Greek, Syrian, Persian and Indian figures. These Western-looking stylistic signatures often include heavy drapery and curly hair,[64] representing a composite (the Greeks, for example, often possessed curly hair).

In the iconography, they are never associated however with the very Hellenistic "Standing Buddha" statues, which might therefore correspond to an earlier historical period.

"Precious things from Da Qin [the Roman Empire] can be found there [in Tianzhu or Northwestern India], as well as fine cotton cloths, fine wool carpets, perfumes of all sorts, sugar candy, pepper, ginger, and black salt."

During the 1st and 2nd century, the Kushan Empire expanded militarily to the north and occupied parts of the Tarim Basin, their original grounds, putting them at the center of the profitable Central Asian commerce with the Roman Empire. They are related to have collaborated militarily with the Chinese against nomadic incursion, particularly when they collaborated with the Han Dynasty general Ban Chao against the Sogdians in 84, when the latter were trying to support a revolt by the king of Kashgar.[66] Around 85, they also assisted the Chinese general in an attack on Turpan, east of the Tarim Basin.

The Kushan Buddhist monk Lokaksema, first known translator of Buddhist Mahayana scriptures into Chinese, c. 170.

In recognition for their support to the Chinese, the Kushans requested a Han princess, but were denied,[66][67] even after they had sent presents to the Chinese court. In retaliation, they marched on Ban Chao in 86 with a force of 70,000, but were defeated by a smaller Chinese force.[66][67] The Yuezhi retreated and paid tribute to the Chinese Empire during the reign of emperor He of Han (89–106).

Later, around 116, the Kushans under Kanishka established a kingdom centered on Kashgar, also taking control of Khotan and Yarkand, which were Chinese dependencies in the Tarim Basin, modern Xinjiang. They introduced the Brahmi script, the Indian Prakrit language for administration, and expanded the influence of Greco-Buddhist art which developed into Serindian art.

The Kushans are again recorded to have sent presents to the Chinese court in 158–159 during the reign of emperor Huan of Han.

Following these interactions, cultural exchanges further increased, and Kushan Buddhist missionaries, such as Lokaksema, became active in the Chinese capital cities of Loyang and sometimes Nanjing, where they particularly distinguished themselves by their translation work. They were the first recorded promoters of Hinayana and Mahayana scriptures in China, greatly contributing to the Silk Road transmission of Buddhism.

After the death of Vasudeva I in 225, the Kushan empire split into western and eastern halves. The Western Kushans (in Afghanistan) were soon subjugated by the Persian Sasanian Empire and lost Bactria and other territories. In 248 they were defeated again by the Persians, who deposed the Western dynasty and replaced them with Persian vassals known as the Kushanshas (or Indo-Sasanians).

The Eastern Kushan kingdom was based in the Punjab. Around 270 their territories on the Gangetic plain became independent under local dynasties such as the Yaudheyas. Then in the mid-4th century they were subjugated by the Gupta Empire under Samudragupta.

In 360 a Kushan vassal named Kidara overthrew the old Kushan dynasty and established the Kidarite Kingdom. The Kushan style of Kidarite coins indicates they considered themselves Kushans. The Kidarite seem to have been rather prosperous, although on a smaller scale than their Kushan predecessors.

These remnants of the Kushan empire were ultimately wiped out in the 5th century by the invasions of the Hephthalites, and the rise of the Gupta empire.

^"The Rabatak inscription claims that in the year 1 Kanishka I's authority was proclaimed in India, in all the satrapies and in different cities like Koonadeano (Kundina), Ozeno (Ujjain), Kozambo (Kausambi), Zagedo (Saketa), Palabotro (Pataliputra) and Ziri-Tambo (Janjgir-Champa). These cities lay to the east and south of Mathura, up to which locality Wima had already carried his victorious arm. Therefore they must have been captured or subdued by Kanishka I himself." "Ancient Indian Inscriptions", S. R. Goyal, p. 93. See also the analysis of Sims-Williams and J.Cribb, who had a central role in the decipherment: "A new Bactrian inscription of Kanishka the Great", in "Silk Road Art and Archaeology" No4, 1995–1996. Also Mukherjee B.N. "The Great Kushanan Testament", Indian Museum Bulletin.

^The Kushans at first retained the Greek language for administrative purposes, but soon began to use Bactrian. The Bactrian Rabatak inscription (discovered in 1993 and deciphered in 2000) records that the Kushan king Kanishka the Great (c. 127 AD), discarded Greek (Ionian) as the language of administration and adopted Bactrian ("Arya language"), from Falk (2001): "The yuga of Sphujiddhvaja and the era of the Kuṣâṇas." Harry Falk. Silk Road Art and Archaeology VII, p. 133.

^ abThe Bactrian Rabatak inscription (discovered in 1993 and deciphered in 2000) records that the Kushan king Kanishka the Great (c. 127 AD), discarded Greek (Ionian) as the language of administration and adopted Bactrian ("Arya language"), from Falk (2001): "The yuga of Sphujiddhvaja and the era of the Kuṣâṇas." Harry Falk. Silk Road Art and Archaeology VII, p. 133.

^André Wink, Al-Hind, the Making of the Indo-Islamic World: The Slavic Kings and the Islamic conquest, 11th-13th centuries, (Oxford University Press, 1997), 57.

^Runion, Meredith L. (2007). The history of Afghanistan. Westport: Greenwood Press. p. 46. ISBN978-0-313-33798-7. The Yuezhi people conquered Bactria in the second century BCE. and divided the country into five chiefdoms, one of which would become the Kushan Empire. Recognizing the importance of unification, these five tribes combined under the one dominate Kushan tribe, and the primary rulers descended from the Yuezhi.

^For a translation of the full text of the Rabatak inscription see: Mukherjee, B.N., "The Great Kushana Testament", Indian Museum Bulletin, Calcutta, 1995. This translation is quoted in: Goyal (2005), p.88.

^For quotation: "The Rabatak inscription claims that in the year 1 Kanishka I's authority was proclaimed in India, in all the satrapies and in different cities like Koonadeano (Kundina), Ozeno (Ujjain), Kozambo (Kausambi), Zagedo (Saketa), Palabotro (Pataliputra) and Ziri-Tambo (Janjgir-Champa). These cities lay to the east and south of Mathura, up to which locality Wima had already carried his victorious arm. Therefore they must have been captured or subdued by Kanishka I himself."see: Goyal, p. 93.

^See also the analysis of Sims-Williams and J. Cribb, specialists of the field, who had a central role in the decipherment: "A new Bactrian inscription of Kanishka the Great", in Silk Road Art and Archaeology No. 4, 1995–1996. pp.75–142.

^C.E. Bosworth, “The Ghaznavids” in History of Civilization: Central Asia in History of Civilizations of Central Asia, Volume IV: The Age of Achievement : A.D. 750 to the End of the Fifteenth Century : Part One : The Historical Social and Economic Setting/edited by M.S. Asimov and C.E. Bosworth. Delhi, Motilal Banarsidass, 1999, 485 pages. (Vol. IV, Pt. I). ISBN 81-208-1595-5. Excerpt from page 101: “The ancient Iranian kingdom of Khwarazm had been ruled until 995 by the old established line of Afrighids of Kath, but control subsequently passed to the new line of Khwarazm Shahs, the Ma'munids of Gurganj”

Dorn'eich, Chris M. (2008). Chinese sources on the History of the Niusi-Wusi-Asi (oi)-Rishi (ka)-Arsi-Arshi-Ruzhi and their Kueishuang-Kushan Dynasty. Shiji 110/Hanshu 94A: The Xiongnu: Synopsis of Chinese original Text and several Western Translations with Extant Annotations. Berlin. To read or download go to: [3]

Sims-Williams, Nicholas. 1998. "Further notes on the Bactrian inscription of Rabatak, with an Appendix on the names of Kujula Kadphises and Vima Taktu in Chinese." Proceedings of the Third European Conference of Iranian Studies Part 1: Old and Middle Iranian Studies. Edited by Nicholas Sims-Williams. Wiesbaden. 1998, pp. 79–93.